Angle correction gauge for torque wrench adapter and tool assembly

Abstract

The present application relates to the technical fields of wrench accessory, and discloses an angle correction gauge for torque wrench adapter and a tool assembly, which comprises a bottom shell, a scale disc and a display disc, the display disc is rotatably installed on the central shaft of the bottom shell, the scale disc is arranged between the bottom shell and the display disc and is fixed with the bottom shell, the outer side of the bottom shell is connected with a tail support, the tail support is provided with a wrench socket, which is used for clamping cooperation with the torque wrench, so that the torque wrench extends along the central shaft in the radial direction, the display disc is provided with a stop block, the stop block is provided with a stop portion for limiting cooperation with the adapter, the central shaft is further provided with a protruding portion, which is used for axial positioning of the connection between the torque wrench and the adapter, the surface of the scale disc is circumferentially and intervaliy provided with a plurality of coefficient scales, the display disc is provided with a display window, and the display window corresponds to the coefficient scales, the central shaft is the vertex, the included angle between the wrench socket and the stop portion is θ, the coefficient value displayed by the display window is δ, and δ and θ are one-to-one corresponding.

Description

Technical Field

[0001] This invention relates to the field of wrench accessories technology, and in particular to an angle calibration tool and assembly for torque wrench adapters. Background Technology

[0002] In aircraft maintenance, a large number of fasteners need to be disassembled and assembled frequently. Different fasteners have specific installation torque requirements, and installation torque is an important indicator for judging whether fasteners are installed in place.

[0003] In confined spaces, torque cannot be applied directly with a torque wrench; an adapter is required as an aid. The torque setting is linearly related to the length and connection angle of the adapter. For example... Figure 1 As shown, one end of adapter 2a engages with fastener 3a to prevent rotation, and the other end of adapter 2a is connected to torque wrench 1a. The set torque value needs to be calculated according to the formula in the maintenance manual SRM51-49-00. The conversion formula is as follows:

[0004] T2 / T1 = A / (A + Lcosθ);

[0005] Where A is the length of the torque wrench, L is the length of the adapter, θ is the angle between the centerline of the torque wrench and the adapter, T1 is the installation torque of the fastener required in the manual, and T2 is the set torque required by the torque wrench.

[0006] During maintenance operations, using an angle gauge to measure the angle between the torque wrench and the adapter makes it difficult to guarantee the positional relationship between the angle gauge, torque wrench, and adapter, resulting in low measurement reliability and accuracy. Moreover, the formula conversion is relatively complicated, leading to a high error rate in calculating the set torque. Summary of the Invention

[0007] The technical problem this invention aims to solve is that using an angle gauge to measure the angle between a torque wrench and an adapter makes it difficult to guarantee the positional relationship between the angle gauge, the torque wrench, and the adapter, resulting in low measurement reliability and accuracy. Furthermore, the formula conversion is cumbersome, leading to a high error rate in calculating the set torque.

[0008] To solve the above-mentioned technical problems, the present invention provides a technical solution for an angle calibration standard for torque wrench adapters:

[0009] An angle calibration tool for torque wrench adapters includes a base housing, a scale disc, and an indicator disc. A central shaft is provided in the middle of the base housing. The indicator disc is rotatably mounted on the central shaft. The scale disc is disposed between the base housing and the indicator disc, and the scale disc is fixedly connected to the base housing.

[0010] The outer side of the bottom shell is connected to a tail support member, which is provided with a wrench slot. The wrench slot is used to engage with a torque wrench so that the torque wrench is arranged to extend radially along the central axis.

[0011] A stop block is installed on the display disk, and the stop block has a stop portion for limiting cooperation with the adapter; the central shaft passing through the display disk is also provided with a protrusion, which is used for axial positioning at the connection between the torque wrench and the adapter;

[0012] The graduated disk has multiple coefficient scales on its surface corresponding to the display disk, and the multiple coefficient scales are evenly spaced along the circumference; the display disk also has a display window, and the display window corresponds to the coefficient scales.

[0013] With the central axis as the vertex, the connection angle between the wrench jaw and the stop is θ, and the coefficient value displayed in the display window is δ, with δ corresponding to θ one-to-one.

[0014] Furthermore, given that the length of the torque wrench is A and the length of the adapter is L, the following condition is satisfied: δ=A / (A+Lcosθ).

[0015] Furthermore, the multiple coefficient scales are divided into 12*N equal parts along the circumference centered on the central axis, where N is an integer.

[0016] Furthermore, the coefficient value δ of the graduated disk is symmetrically distributed about a diameter containing the central axis, and the coefficient value δ is any value between 0.7 and 1.5.

[0017] Furthermore, the bottom housing includes an annular edge, which is arranged in a circle with the central axis as the center, and the scale disk and the display disk are both arranged inside the annular edge;

[0018] The annular edge is also provided with multiple angular scales, which are divided into 36*n equal parts in the circumferential direction, where n is an integer, and the angle value of the angular scale corresponding to the wrench jaw is zero.

[0019] Furthermore, an ear plate is fixedly provided on the outer side of the bottom shell, and the tail support is hinged to the ear plate. The hinge axis of the tail support is perpendicular to the radial direction of the scale disc. When the tail support is erected, the wrench latch engages with the torque wrench.

[0020] Furthermore, the stop block is rotatably mounted on the display disk, the rotation axis of the stop block is arranged parallel to and spaced apart from the central axis, and at least two stopping parts are provided on the outer periphery of the stop block.

[0021] Furthermore, the outer periphery of the stop block is provided with three stopping parts, and the radial distances between the three stopping parts relative to the rotation axis of the stop block are not equal. The stop block is also provided with specification markings corresponding to the positions of the three stopping parts.

[0022] Furthermore, a one-way bearing is installed between the display disk and the central shaft; or, a one-way bearing is installed between the display disk and the bottom housing.

[0023] To solve the above-mentioned technical problems, the present invention provides a technical solution for a tool assembly based on an angle calibration form for torque wrench adapters:

[0024] A tool assembly based on an angle calibration tool for a torque wrench adapter includes a torque wrench, an adapter, and an angle calibration tool. The angle calibration tool includes a base housing, a scale disc, and an indicator disc. A central shaft is provided in the middle of the base housing. The indicator disc is rotatably mounted on the central shaft. The scale disc is disposed between the base housing and the indicator disc, and the scale disc is fixedly connected to the base housing.

[0025] The outer side of the bottom shell is connected to a tail support member, which is provided with a wrench slot. The wrench slot is used to engage with a torque wrench so that the torque wrench is arranged to extend radially along the central axis.

[0026] A stop block is installed on the display disk, and the stop block has a stop portion for limiting cooperation with the adapter; the central shaft passing through the display disk is also provided with a protrusion, which is used for axial positioning at the connection between the torque wrench and the adapter;

[0027] The graduated disk has multiple coefficient scales on its surface corresponding to the display disk, and the multiple coefficient scales are evenly spaced along the circumference; the display disk also has a display window, and the display window corresponds to the coefficient scales.

[0028] With the central axis as the vertex, the connection angle between the wrench jaw and the stop is θ, and the coefficient value displayed in the display window is δ, with δ corresponding to θ one-to-one.

[0029] Furthermore, given that the length of the torque wrench is A and the length of the adapter is L, the following condition is satisfied: δ=A / (A+Lcosθ).

[0030] Furthermore, the multiple coefficient scales are divided into 12*N equal parts along the circumference centered on the central axis, where N is an integer.

[0031] Furthermore, the coefficient value δ of the graduated disk is symmetrically distributed about a diameter containing the central axis, and the coefficient value δ is any value between 0.7 and 1.5.

[0032] Furthermore, the bottom housing includes an annular edge, which is arranged in a circle with the central axis as the center, and the scale disk and the display disk are both arranged inside the annular edge;

[0033] The annular edge is also provided with multiple angular scales, which are divided into 36*n equal parts in the circumferential direction, where n is an integer, and the angle value of the angular scale corresponding to the wrench jaw is zero.

[0034] Furthermore, an ear plate is fixedly provided on the outer side of the bottom shell, and the tail support is hinged to the ear plate. The hinge axis of the tail support is perpendicular to the radial direction of the scale disc. When the tail support is erected, the wrench latch engages with the torque wrench.

[0035] Furthermore, the stop block is rotatably mounted on the display disk, the rotation axis of the stop block is arranged parallel to and spaced apart from the central axis, and at least two stopping parts are provided on the outer periphery of the stop block.

[0036] Furthermore, the outer periphery of the stop block is provided with three stopping parts, and the radial distances between the three stopping parts relative to the rotation axis of the stop block are not equal. The stop block is also provided with specification markings corresponding to the positions of the three stopping parts.

[0037] Furthermore, a one-way bearing is installed between the display disk and the central shaft; or, a one-way bearing is installed between the display disk and the bottom housing.

[0038] Compared with the prior art, the torque wrench adapter angle calibration standard and tool assembly of the present invention have the following advantages: The torque wrench adapter angle calibration standard adopts a design consisting of a base shell, a graduated disc, an indicator disc, a tail support, and a stop block. A central shaft is located in the middle of the base shell, and the indicator disc is rotatably mounted on the central shaft. The graduated disc is positioned between the base shell and the indicator disc, and is fixedly connected to the base shell. The position of the graduated disc relative to the base shell is fixed, while the indicator disc can rotate circumferentially around the central shaft. By rotating the indicator disc by different angles, the corresponding coefficient value δ of the graduated disc can be displayed.

[0039] Furthermore, a tail support is connected to the outer side of the base housing. The tail support's wrench latch engages with the torque wrench, allowing the torque wrench to extend radially along the central axis, accurately limiting the relative position of the torque wrench and the base housing. A stop block is mounted on the display disc, and its stopping part limits the relative position of the adapter and the display disc.

[0040] The central shaft runs through the display disc and also has a protrusion. The protrusion serves to axially position the connection between the torque wrench and the adapter, so that the base shell, display disc, torque wrench and adapter are all at the same center. This ensures that the rotation angle between the base shell and the display disc is equal to the connection angle θ between the wrench jaw and the stop, and also equal to the angle between the torque wrench and the adapter.

[0041] In addition, the scale disk has multiple coefficient scales on its surface corresponding to the display disk. These coefficient scales are evenly spaced along the circumference. The display disk also has a display window, which corresponds to the coefficient scales. With the central axis as the vertex, the connection angle between the wrench jaw and the stop is θ. The coefficient value displayed in the display window is δ, and δ corresponds one-to-one with θ.

[0042] The key is that the coefficient value δ displayed in the indicator window corresponds one-to-one with the connection angle θ between the wrench jaws and the stop. When the indicator disc rotates to the position where the stop and the adapter are in a limiting engagement, the connection angle θ reflects the angle between the torque wrench and the adapter. The corresponding coefficient value δ is displayed in the indicator window. The coefficient value δ is calculated in advance according to the conversion formula. By multiplying the displayed coefficient value δ by the installation torque T1 of the fastener required in the manual, the required setting torque T2 of the torque wrench can be obtained quickly and accurately. Compared with using a protractor, the measurement reliability and accuracy are high, the formula conversion process is greatly simplified, and the error rate of calculating the setting torque is reduced. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the connection between an existing torque wrench and an adapter in the background art;

[0044] Figure 2 This is a perspective view of the torque wrench adapter angle calibration form and the torque wrench and adapter assembly in an embodiment of the present invention.

[0045] Figure 3 yes Figure 2 Top view of the assembly of the center angle calibrator, torque wrench, and adapter;

[0046] Figure 4 This is a three-dimensional schematic diagram of the angle calibration form for torque wrench adapter in an embodiment of the present invention;

[0047] Figure 5 This is an exploded schematic diagram of the angle calibration form for the torque wrench adapter in an embodiment of the present invention;

[0048] Figure 6 This is a bar chart of angle-coefficient values ​​for the torque wrench adapter angle calibration form in this embodiment of the invention;

[0049] Figure 1Chinese: 1a-Torque wrench, 2a-Adapter, 3a-Fastener;

[0050] Figures 2 to 5 In the middle: 1-bottom shell, 10-central shaft, 11-protrusion, 12-ring edge, 13-angle scale, 14-ear plate, 15-one-way bearing, 2-scale disk, 20-coefficient scale, 3-display disk, 30-display window, 4-tail support, 40-wrench jaw, 5-stop block, 50-stop part, 6-torque wrench, 7-adapter. Detailed Implementation

[0051] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" used to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] like Figures 2 to 5As shown, the torque wrench adapter angle calibration tool of the present invention includes a base shell 1, a scale disk 2 and an indicator disk 3. A central shaft 10 is provided in the middle of the base shell 1. The indicator disk 3 is rotatably mounted on the central shaft 10. The scale disk 2 is disposed between the base shell 1 and the indicator disk 3, and the scale disk 2 is fixedly connected to the base shell 1.

[0056] The outer side of the bottom housing 1 is connected to a tail support 4, which is provided with a wrench slot 40. The wrench slot 40 is used to engage with a torque wrench 6 so that the torque wrench 6 extends radially along the central axis 10. A stop block 5 is installed on the display disk 3. The stop block 5 has a stop portion 50 for limiting engagement with the adapter 7. The central axis 10 passes through the display disk 3 and is also provided with a protrusion 11. The protrusion 11 is used for axial positioning at the connection between the torque wrench 6 and the adapter 7.

[0057] The scale disk 2 has multiple coefficient scales 20 on its surface corresponding to the display disk 3. The multiple coefficient scales 20 are evenly distributed along the circumference. The display disk 3 also has a display window 30, which corresponds to the coefficient scales 20. With the central axis 10 as the vertex, the connection angle between the wrench jaw 40 and the stop part 50 is θ. The coefficient value displayed in the display window 30 is δ, and δ corresponds one-to-one with θ.

[0058] This torque wrench adapter angle calibration tool adopts a design consisting of a base shell 1, a graduated disc 2, an indicator disc 3, a tail support 4, and a stop block 5. The base shell 1 has a central shaft 10 in its middle, and the indicator disc 3 is rotatably mounted on the central shaft 10. The graduated disc 2 is positioned between the base shell 1 and the indicator disc 3, and is fixedly connected to the base shell 1. The position of the graduated disc 2 relative to the base shell 1 is fixed, while the indicator disc 3 can rotate around the central shaft 10. By rotating the indicator disc 3 by different angles, the corresponding coefficient value δ of the graduated disc 2 can be displayed.

[0059] Furthermore, a tail support 4 is connected to the outer side of the bottom housing 1. The tail support 4 engages with the torque wrench 6 via a wrench slot 40, allowing the torque wrench 6 to extend radially along the central axis 10, thus accurately limiting the relative position of the torque wrench 6 and the bottom housing 1. A stop block 5 is installed on the display disc 3. The stop part 50 of the stop block 5 limits the engagement of the adapter 7, thus accurately limiting the relative position of the adapter 7 and the display disc 3.

[0060] The central shaft 10 passes through the display disk 3 and is also provided with a protrusion 11. The protrusion 11 is used to axially position the connection between the torque wrench 6 and the adapter 7, so that the bottom housing 1, the display disk 3, the torque wrench 6 and the adapter 7 are all in the same center. This ensures that the rotation angle between the bottom housing 1 and the display disk 3 is equal to the connection angle θ between the wrench jaw 40 and the stop part 50, and also equal to the angle between the torque wrench 6 and the adapter 7.

[0061] In addition, the scale disk 2 has multiple coefficient scales 20 on the surface of the display disk 3, and the multiple coefficient scales 20 are evenly distributed along the circumference. The display disk 3 also has a display window 30, which corresponds to the coefficient scales 20. With the central axis 10 as the vertex, the connection angle between the wrench jaw 40 and the stop part 50 is θ, and the coefficient value displayed in the display window 30 is δ, which corresponds one-to-one with θ.

[0062] The key is that the coefficient value δ displayed in the display window 30 corresponds one-to-one with the connection angle θ between the wrench jaw 40 and the stop 50. When the display disc 3 rotates to the position where the stop 50 and the adapter 7 are in a limiting engagement, the connection angle θ reflects the angle between the torque wrench 6 and the adapter 7. The corresponding coefficient value δ is displayed in the display window 30. The coefficient value δ is calculated in advance according to the conversion formula. By multiplying the displayed coefficient value δ by the installation torque T1 of the fastener required in the manual, the required setting torque T2 of the torque wrench can be obtained quickly and accurately. Compared with using an angle gauge, the measurement reliability and accuracy are high, the formula conversion process is greatly simplified, and the error rate of calculating the setting torque is reduced.

[0063] like Figure 2 As shown, the length of torque wrench 6 is A, and the length of adapter 7 is L, satisfying: δ=A / (A+Lcosθ).

[0064] It should be noted that this angle calibration method is only for a specific length A of the torque wrench 6 and a specific length L of the adapter 7, and is based on a set of pre-calculated coefficient values ​​δ. If the length A of the torque wrench 6 and / or the length L of the adapter 7 change, a separate, targeted angle calibration method will be required. Additionally, Figure 2 , Figure 3 In the middle, the stop block 5 is not in the limited position that cooperates with the adapter 7. When using it, the display disk 3 and the stop block 5 need to be rotated around the central axis 10 to the limited position before the connection angle θ and the coefficient value δ can be read directly.

[0065] As a further preferred embodiment, the multiple coefficient scales 20 are divided into 12*N equal parts along the circumference centered on the central axis 10, where N is an integer. In this embodiment, there are 36 coefficient scales 20, meaning that the scale disk 2 is divided into 36 equal parts by 36 coefficient scales 20, with each scale occupying a 10° central angle, thereby displaying the coefficient values ​​δ corresponding to the 36 sets of connecting angles θ. Furthermore, the coefficient values ​​δ of the scale disk 2 are symmetrically distributed about a diameter containing the central axis 10, and the coefficient values ​​δ are any values ​​between 0.7 and 1.5.

[0066] Correspondingly, the bottom shell 1 includes an annular edge 12, which is arranged in a circle with the central axis 10 as the center. The scale disk 2 and the indicator disk 3 are both located inside the annular edge 12. The annular edge 12 is also provided with multiple angle scales 13, which are divided into 36*n equal parts in the circumferential direction, where n is an integer, and the angle value of the angle scale 13 corresponding to the wrench jaw 40 is zero. Specifically, there are 36 angle scales 13, and each angle scale represents a 10° central angle, that is, the included angle between the torque wrench 6 and the adapter 7 is equal to ten times the angle scale 13.

[0067] The one-to-one correspondence between the connecting angle θ and the coefficient value δ is calculated in units of 5° from 0 to 180°, as shown in the table below:

[0068]

[0069] like Figure 6 As shown, the one-to-one correspondence between the connecting angle θ and the coefficient value δ is calculated in units of 10° from 0 to 180°. That is, the coefficient values ​​δ of the scale disk 2 are arranged sequentially along the circumference. The coefficient value δ corresponding to the connecting angle θ can be quickly read through the display window 30, which simplifies the formula conversion process.

[0070] In this embodiment, an ear plate 14 is fixedly provided on the outer side of the bottom shell 1, and the tail support 4 is hinged to the ear plate 14. The hinge axis of the tail support 4 is perpendicular to the radial direction of the scale disk 2. When the tail support 4 is erected, the wrench slot 40 engages with the torque wrench 6, which facilitates storage and unfolding for use.

[0071] Furthermore, the stop block 5 is rotatably mounted on the display disk 3. The rotation axis of the stop block 5 is arranged parallel to and spaced apart from the central axis 10. At least two stop portions 50 are provided on the outer periphery of the stop block 5. As a further preferred embodiment, the outer periphery of the stop block 5 is provided with three stop portions 50. The radial distances between the three stop portions 50 and the rotation axis of the stop block 5 are not equal. The stop block 5 is also marked with specification markings corresponding to the positions of the three stop portions 50. The three specification markings are 5 / 16, 9 / 32, and 3 / 8, respectively, corresponding to different specifications of the adapter 7, thereby improving the adaptability and versatility of the angle calibration standard.

[0072] A one-way bearing is installed between the display disk 3 and the central shaft 10; or, a one-way bearing 15 is installed between the display disk 3 and the base housing 1, ensuring that the display disk 3 can only rotate clockwise or counterclockwise relative to the base housing 1 or the central shaft 10, thereby ensuring that the connection angle θ is equal to the angle between the torque wrench 6 and the adapter 7.

[0073] A specific embodiment of the tool assembly based on an angle calibration standard for a torque wrench adapter according to the present invention includes a torque wrench, an adapter, and an angle calibration standard. The angle calibration standard is the torque wrench adapter angle calibration standard described in the above specific embodiment. The assembly relationship between the torque wrench, the adapter, and the angle calibration standard is as described in the embodiment of the torque wrench adapter angle calibration standard of the above invention, and will not be repeated here.

[0074] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An angle calibration tool for torque wrench adapters, characterized in that, The device includes a bottom housing, a scale disk, and a display disk. A central shaft is provided in the middle of the bottom housing. The display disk is rotatably mounted on the central shaft. The scale disk is disposed between the bottom housing and the display disk, and the scale disk is fixedly connected to the bottom housing. The outer side of the bottom shell is connected to a tail support member, which is provided with a wrench slot. The wrench slot is used to engage with a torque wrench so that the torque wrench is arranged to extend radially along the central axis. A stop block is installed on the display disc, and the stop block has a stop portion for limiting cooperation with the adapter; the central shaft passing through the display disc is also provided with a protrusion, which is used for axial positioning at the connection between the torque wrench and the adapter; The graduated disk has multiple coefficient scales on its surface corresponding to the display disk, and the multiple coefficient scales are evenly spaced along the circumference; the display disk also has a display window, and the display window corresponds to the coefficient scales. With the central axis as the vertex, the connection angle between the wrench jaw and the stop is θ, and the coefficient value displayed in the display window is δ, with δ corresponding to θ one-to-one; Given that the length of the torque wrench is A and the length of the adapter is L, the following conditions are met: δ = A / (A + Lcosθ); The multiple coefficient scales are divided into 12*N equal parts along the circumference centered on the central axis, where N is an integer; The coefficient value δ of the graduated disk is symmetrically distributed about a diameter containing the central axis, and the coefficient value δ is any value between 0.7 and 1.

5. The bottom housing includes an annular edge, which is arranged in a circle with the central axis as the center. The scale disk and the display disk are both arranged inside the annular edge. The annular edge is also provided with multiple angular scales, which are divided into 36*n equal parts in the circumferential direction, where n is an integer, and the angle value of the angular scale corresponding to the wrench jaw is zero.

2. The torque wrench adapter angle calibration tool according to claim 1, characterized in that, An ear plate is fixedly provided on the outer side of the bottom shell. The tail support is hinged to the ear plate, and the hinge axis of the tail support is perpendicular to the radial direction of the scale disk. When the tail support is erected, the wrench latch engages with the torque wrench.

3. The torque wrench adapter angle calibration tool according to claim 1, characterized in that, The stop block is rotatably mounted on the display disk, the rotation axis of the stop block is arranged parallel to the central axis at intervals, and at least two stopping parts are provided on the outer periphery of the stop block.

4. The torque wrench adapter angle calibration tool according to claim 1, characterized in that, The stop block has three stopping parts on its outer periphery. The radial distances between the three stopping parts and the rotation axis of the stop block are not equal. The stop block is also marked with specification marks corresponding to the positions of the three stopping parts.

5. The torque wrench adapter angle calibration tool according to claim 1, characterized in that, A one-way bearing is installed between the display disk and the central shaft; or, a one-way bearing is installed between the display disk and the bottom housing.

6. A tool assembly based on an angle calibration form for a torque wrench adapter, characterized in that, It includes a torque wrench, an adapter, and an angle calibration tool, wherein the angle calibration tool is the angle calibration tool for torque wrench adapters as described in any one of claims 1 to 5.

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